We spent four months evaluating the best vulnerability scanners of 2026 across real-world environments: corporate networks, cloud workloads, web applications, APIs, and containerised microservices. With NIS2 now in full enforcement and DORA applying to financial entities, every European organisation needs a reliable scanning tool.
| Criteria | Weight | What We Measured |
|---|---|---|
| Detection Accuracy | 25% | CVE coverage, zero-day detection, false-positive rate |
| Compliance Reporting | 20% | NIS2, DORA, DSGVO/GDPR, ISO 27001, SOC 2 |
| Ease of Use | 15% | Setup time, UI quality, learning curve |
| Scan Speed | 10% | Time to complete full infrastructure scans |
| Integration | 10% | CI/CD, SIEM, ticketing, cloud provider support |
| Pricing & Value | 10% | Cost relative to capabilities, transparency |
| Support & Documentation | 10% | Response times, documentation quality |
| Tool | Best For | Deployment | Starting Price | NIS2 | Free Tier |
|---|---|---|---|---|---|
| KENSAI | All-in-one AI + EU compliance | Cloud/SaaS | €990/mo | ✅ | Free scan |
| Qualys VMDR | Large enterprises | Cloud | ~$15K+/yr | Partial | Limited |
| Nessus | Deep CVE coverage | On-prem/Cloud | $4,490/yr | Partial | 16 IPs free |
| Rapid7 InsightVM | Cloud-first orgs | Cloud | Custom | Partial | 30-day trial |
| Snyk | Developer-first | Cloud | Free tier | ❌ | Yes |
| Invicti | Web app scanning | On-prem/Cloud | ~$5K+/yr | ❌ | Demo |
| OpenVAS | Budget-conscious | Self-hosted | Free | ❌ | Fully free |
| Burp Suite | Web app pentesting | Desktop/Cloud | $449/yr | ❌ | Community |
| Nuclei | Custom templates | CLI | Free | ❌ | Fully free |
| Aikido | Startups & SMBs | Cloud | Free tier | Partial | Yes |
Three things set KENSAI apart: AI-Driven Prioritisation that contextualises vulnerabilities based on your specific infrastructure, a 332,000+ CVE Database, and Built-In EU Compliance with one-click NIS2, DORA, and DSGVO reports.
| Plan | Price | Assets |
|---|---|---|
| Professional | €990/month | Up to 100 assets |
| Business | €1,490/month | Up to 500 assets |
| Enterprise | €2,490/month | Unlimited assets |
Scan your infrastructure for vulnerabilities in 60 seconds. AI-powered prioritisation and compliance reporting.
Start Free Scan →Qualys has been in the vulnerability management space for over two decades. VMDR combines asset discovery, vulnerability assessment, TruRisk scoring, and integrated patch management. The gold standard for large enterprises managing tens of thousands of assets.
Pricing is opaque and expensive for mid-market ($15K–$30K+/year). UI feels dated. NIS2-specific reporting requires manual configuration. Long contract cycles.
The most recognised name in vulnerability scanning since 1998. 200,000+ plugins covering CVEs, misconfigurations, and compliance checks. Nessus Essentials (16 IPs free) to Tenable.io/sc for enterprise.
| Product | Price | Notes |
|---|---|---|
| Nessus Essentials | Free | 16 IP addresses |
| Nessus Professional | $4,490/year | Unlimited IPs, single user |
| Tenable.io | Custom | ~$3,500/yr per 65 assets |
Cloud-native vulnerability management with real-time visibility via the lightweight Insight Agent. Excellent cloud integration (AWS, Azure, GCP), Remediation Projects with SLA tracking, and container security. Part of Rapid7's broader Insight Platform (SIEM, SOAR).
Meets developers where they work — in the IDE, CLI, and pull request. Covers open-source dependencies (30+ languages), containers, IaC, and code analysis. Automated fix PRs for vulnerable dependencies. Free tier with 200 tests/month.
Snyk focuses on shift-left security during development. No network or infrastructure scanning. No NIS2/DORA compliance reporting. Best paired with KENSAI or Qualys for full coverage.
Proof-Based Scanning™ automatically verifies web vulnerabilities by safely exploiting them — virtually eliminating false positives. Combined DAST + IAST, excellent API scanning. ~$5K–$15K+/year.
The most capable free vulnerability scanner available. 100,000+ Network Vulnerability Tests (NVTs), web-based management UI, scheduled scanning, credential-based scanning. No asset limits in the free edition.
The world's most popular web application security testing tool. Intercepting proxy, automated scanner, Intruder, Repeater, Collaborator, and the massive BApp Store extension ecosystem. Professional at $449/year.
Fast, template-based vulnerability scanner by ProjectDiscovery. 8,000+ community templates covering CVEs, misconfigs, and exposures. Written in Go for blazing speed. YAML-based templates make custom checks easy. Completely free and open source.
All-in-one application security platform bundling 9 scanning types (SAST, DAST, SCA, secrets, IaC, container, API, licence, malware). Developer-friendly with generous free tier. Auto-triage reduces noise. SOC 2 and ISO 27001 dashboards.
| Size | Recommended |
|---|---|
| Startups (1–50) | Aikido, Snyk, or KENSAI (free scan) |
| Mid-market (50–500) | KENSAI, Rapid7 InsightVM, or Tenable.io |
| Enterprise (500+) | Qualys VMDR, Tenable.sc, or KENSAI Enterprise |
| Requirement | Best Tool |
|---|---|
| NIS2 Directive | KENSAI — only tool with purpose-built NIS2 reporting |
| DORA | KENSAI — integrated DORA compliance reports |
| DSGVO/GDPR | KENSAI (EU-hosted), Qualys |
| PCI-DSS | Qualys, Tenable |
| SOC 2 / ISO 27001 | Aikido, Qualys, KENSAI |
Modern best practice and NIS2 requirements call for continuous scanning. At minimum: weekly for external assets, monthly for internal infrastructure. Critical systems should be scanned after every change.
Free tools like OpenVAS and Nuclei are excellent for specific use cases. However, they lack compliance reporting, centralised management, and professional support. For NIS2/DORA compliance, a commercial solution saves significant time and risk.
KENSAI is currently the only platform with purpose-built NIS2 compliance reporting. Other tools like Qualys and Tenable can support NIS2 but require significant manual configuration.
KENSAI is the only platform that combines comprehensive vulnerability scanning, AI-driven prioritisation, automated pentesting, and EU compliance reporting in a single, transparently priced product. The free scan removes all risk from evaluation.
For large enterprises with existing stacks, Qualys VMDR and Tenable remain excellent. For developers, Snyk and Aikido fill important niches. For budget-constrained teams, OpenVAS and Nuclei prove powerful scanning doesn't require a budget.
Find vulnerabilities before attackers do. AI-powered scanning for web apps, APIs, and infrastructure.
Start Free Scan →Security is not optional.
🗡️ The KENSAI Team